<?php 
function mail_utf8($to, $subject = '(No subject)', $message = '', $header = '') {
	$header_ = 'MIME-Version: 1.0' . "\r\n" . 'Content-type: text/plain; charset=UTF-8' . "\r\n";
	$send_message=mail($to, '=?UTF-8?B?'.base64_encode($subject).'?=', $message, $header_ . $header);
	if ($send_message) {
		return true;
	} else {
		return false;
	}
}
?>